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Standard combination pH probe with a refillable reference and built-in temperature sensor. Contains fixed cable with BNC and 3.5 mm phone connectors compatible Hach One series meters.

• Accurate
• Easy to Use
• Rugged and Durable
• Flexible

  Accurate

  You don't just need an answer, but the right one, and fast.

  Easy to Use

  Now, more than ever, you're looking for new ways to stretch your dollar and resources. Skip studying complicated user manuals and spend your time measuring, thanks to Hach's innovative menu designs and simple keypads for truly intuitive operation.

  Rugged and Durable

  Rely on Hach's durable measuring systems designed to withstand the rigors of outdoor testing and frequent use. Choose from the industry's toughest probes or non-glass electrodes for rugged, waterproof systems that deliver day after day.

  Flexible

  Need to measure in both the lab and field? Hach offers efficiency with reliable, high-performance systems that easily move with you from the benchtop directly to the testing site. Measure the parameters you need today with the assurance you can expand them tomorrow.

  What's in the box

  Includes: 51940 pH electrode （with built-in temperature sensor）, small bottle of electrolyte refill solution, and User Manual.

  Specifications

  Cable Length:1 m

  Dimensions （D x L）:0.48 in x 6 in （12.1 mm x 152.5 mm）

  Filling Solution:5194100

  Junction:Glass frit

  Length:6 in （ 152.5 mm ）

  Material:Sensor Body: Epoxy

  Probe Type:Laboratory

  Range:0 to 14 pH

  Sensor Type:Glass

  Temperature Range:0 to 45 °C

  Thermistor:（ATC）